A method of DEM construction and related error analysis.pdfVIP

ARTICLE IN PRESS Computers Geosciences 36 (2010) 717–725 Contents lists available at ScienceDirect Computers Geosciences journal homepage: /locate/cageo A method of DEM construction and related error analysis Chuanfa Chen n, Tianxiang Yue Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, 11A, Datun Road, 3 Anwai, Beijing 100101, China a r t i c l e i n f o a b s t r a c t Article history: The concept and the computation of terrain representation error (ETR) are investigated and total DEM Received 1 August 2008 error is presented as an accuracy index for DEM evaluation at a global level. A promising method of Received in revised form surface modelling based on the theorem of surfaces (SMTS) has been developed. A numerical test and a 17 November 2009 real-world example are employed to comparatively analyze the simulation accuracy of SMTS and the Accepted 4 December 2009 classical interpolation methods, including IDW, SPLINE and KRIGING performed in ARCGIS 9.1 in terms of sampling and interpolation errors and of total DEM error. The numerical test shows that SMTS is Keywords: much more accurate than the classical interpolation methods and ETR has a worse influence on the DEM accuracy of SMTS than th